When alum is added to the waste water containing calcium ions which compound is formed as a precipitate?

Along with ferrous sulphate what other chemical is added in order to bring about precipitation?

Why is Ferric ammonium sulfate generally not used as a coagulant?

Newton’s law is used for_______

How many types of solids are present in water?

Iron precipitation occurs at which pH?

What is the recommended surface loading rate in case of alum floc suspension?

How many types of sedimentation tanks are there based on the method of operation?